We found this circuit in a 1998 publication. The circuit has controls for both frequency and signal strength. A lamp is used to monitor the signals. The supply is made with a voltage of 12 V.
This power supply for TTL and CMOS circuits with a voltage of 5 to 15 V was found in the Special...
The assembly of this interesting circuit appeared in Radio Electronics magazine in June 1958....
We found this circuit in the June 1992 issue of Radio Electronics magazine. The sensor is a common...